A major Hong Kong study has found “substantially higher” levels of antibodies in people
vaccinated against Covid-19 with the German-made BioNTech vaccine, compared with those who received China’s Sinovac shots.
The presence of antibodies is a sign that the vaccine is working to protect an individual, although the quantity of the proteins generated by the body’s immune system to identify and neutralise the
coronavirus does not directly correlate to the level of immunity.